Wrench.



No. 735,734. 1 PATENTBD AUG. 11, 1903.l

G. G. ENGLISH.

WRENCH.

APPLIOATION FILED SEPT. 19, 1900.

No Komm.

N6. vatse.

UNITED STATES ;Patented August 11, IQO.

PATENT OFFICE.

WRENCH.

SPECIFICATION formingppart of Lettersratent No. 735,734, dated kAugust1.1, 190s; lAmilicatio'n filed-September 19. 1900.' Serial No, 30,499.(No model.)

To @ZZ whom, it' may concern,.- v

Beit known that I, CLARENCE C; ENGLISH, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inWrenches, of which the following. is a' specification.

My invention relates to Wrenches; and my object is to provide a strongand simple tool composed of loose parts without rivets or otherconnecting devices, which can be cheaply constructed, is easily andaccurately adjusted, and firmly locked in adjustment.

My wrench comprises a lixed jaw, which also forms the handle, a slidingjaw having a sleeve inclosing the fixed jaw and movable thereupon, and alocking-cam having a bearing in said sleeve and provided with a toothedor milled edge which engages with a correspondingly-formed surface onthe fixed jaw.

The invention is illustrated in the accompanying drawings, in which-Figure lis a perspective view of the wrench. Fig. 2 is a side elevation,broken away to show partsin longitudinal section. Fig. 3 is acrosssection on line .fr with the jaws locked by the cam. Fig. 4t is asimilar cross-section with the jaws released, in position for slidingadjustment. Fig. 5 is a perspective view of the locking-cam.

A represents the handle of the wrench, formed withthe fixed jaw B. Thesurface of the handle adjacent to the jaw and for the whole or asufficient part of the length is formed with. a concave channel which istoothed, threaded, or milled, as showngat a.

C represents the movable jaw whichY is formed as a part of the sleeve D,which is fitted to a rounded edge g and the sides of the handle, leavinga space adjacent tothe channel ct. This space formsv a bearing for thelocking-cam E, which has a toothed, threaded, or milled surfacecorresponding to that of thev channel. The end of the cam abuts againsta shoulder c of the jaw C. The cam has a -handle C', which when theparts are assembled projects through a slot cl of the sleeve, with aclose lit in the slot. In assembling the parts the cam is slipped intothe sleeve and the handle allowed to drop through the slot, as in Fig.4. The sleeve is then placed upon the handle, and as the fiat face e ofthe cam is adjacent to the channel a the sleeve can be moved freely uponthe handle. The parts are locked by turning the cam to the position ofFig. 3, causing its milled surface to engage and bind strongly in thechannel c, thereby drawing the sleeve and handle tightly together. Theedge of the cam is dressed off slightly, as shown at f, to insure aproper engagement of the milled sur- A faces, the milling continuing,however, at the same depth around the dressed-off corner. The ease ofoperation 'as to adjustment and locking will be apparent, since it isonly necessary to turn the cam to position of Fig. 4 in order to-renderthe jaws freely adjustable. It will also be observed that no screws orrivets are employed, the parts being loosely assembled and being selfholding and locking. A stop may, however, be used on the handle, ifdesired, to keep the sleeve from being entirely separated from it. Inordinary use,

however, I have n ot found such a stop necessary.

The strength ofthe device will also be noted, and particularly themanner in which the shoulder c abuts against the solid cam. The

sleeve is preferably made substantially ellip-v tical in cross-Section,and the channel in the upper edge of the handle forms substantially acircle withthe upper end of the ellipse. In this manner when the cam isrotated between the handle and the sleeve to lock the jaw the sleeve istightly bound at top and bottom, and as the sides fit snugly against thesides of the handle andthe shoulder c abuts against the end of the camall lost motion -is taken up and the parts are held absolutely rigid,and thus the greatest strength is .secured when using the wrench. j, .I

Having thus fully described my invention, what I claim as new, anddesire to'secure by Letters Patent, isl l. A wrench comprising a handle,the lower edge of which is rounded and the upper edge is provided with amilled channel extending longitudinally thereof,` one end of the handlebeing provided with a rigid jaw, a slotted sleeve on the handle,substantially elliptical in cross-section, the forward end of which is'provided with a rigid jaw, the channel of the ICO handle forming withthe upper side of the sleeve a substantial circle, a segmental cambetween the handle and the sleeve, provided with a handle which projectsthrough the slot in the sleeve, a portion of the surface of the camopposite the projection being provided with teeth for engaging with themilled channel when the cam is rotated into its locking position.

2. A Wrench comprising a handle, one end of which is provided with arigid jaw, and its upper edge is provided with a concave milled channelextending longitudinally thereof, a sleeve on the handle, one end ot'which is provided with a rigid jaw, and the other end is slotted and hasthe inner portion recessed, the wall of the recess forming a shoulder atone end and being concave to correspond with the curvature of thechannel, and a substantially cylindrical cam in said recessed portion, aportion of the surface of which is provided with teeth to engage withthe milled channel when in its operative position, said cam beingprovided With a handle intermediate of its ends, which projects throughthe slot of the sleeve, the distance of the projection from one end ofthe cam being suchthat said end will be held firmly against the shoulderin the sleeve at all times.

3. A wrench comprising a handle, one end 5o of which is provided with arigid jaw, and its upper edge is provided with a milled channelextending longitudinally thereof, a slotted sleeve on the handle, oneend of which is provided With a rigid jaw, and the inside of the 55.slotted portion is recessed longitudinally,

CLARENCE C. ENGLISH.

\Vtnesses:

L. W.SEELY, F. M. BURT.

